The HPD-15 contains six demo songs that demonstrate its internal sounds and effects. Use the following procedure to listen to the demo songs:

1. Press SEQUENCER and SYSTEM at the same time.

2. Turn the PATCH/VALUE dial to select the demo song you wish to hear.

3. Press PLAY/STOP to begin playback.

4. Press PLAY/STOP once more to stop playback.

5. Press EXIT to return to the normal Play mode.